40709645237 has 4 divisors (see below), whose sum is σ = 40712236140. Its totient is φ = 40707054336.

The previous prime is 40709645231. The next prime is 40709645243. The reversal of 40709645237 is 73254690704.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (40709645231) and next prime (40709645243).

It can be written as a sum of positive squares in 2 ways, for example, as 9794862961 + 30914782276 = 98969^2 + 175826^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40709645237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40709645191 and 40709645200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40709645231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1271738 + ... + 1303355.

It is an arithmetic number, because the mean of its divisors is an integer number (10178059035).

Almost surely, 2^40709645237 is an apocalyptic number.

It is an amenable number.

40709645237 is a deficient number, since it is larger than the sum of its proper divisors (2590903).

40709645237 is a wasteful number, since it uses less digits than its factorization.

40709645237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590902.

The product of its (nonzero) digits is 1270080, while the sum is 47.

The spelling of 40709645237 in words is "forty billion, seven hundred nine million, six hundred forty-five thousand, two hundred thirty-seven".